T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

A234131

T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1.

Terms

    a(0) =91a(1) =469a(2) =469a(3) =2413a(4) =4757a(5) =2413a(6) =12457a(7) =47933a(8) =47933a(9) =12457a(10) =64441a(11) =484731a(12) =951709a(13) =484731a(14) =64441a(15) =333883a(16) =4909103a(17) =19007583a(18) =19007583a(19) =4909103a(20) =333883a(21) =1731979a(22) =49779251a(23) =380250439a(24) =753253097a(25) =380250439a(26) =49779251a(27) =1731979a(28) =8992639

External references